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Contents   Fixed field   0xx   1xx   2xx   3xx   4xx   5xx   6xx   7xx   8xx   9xx

050  Library of Congress Call Number (R)

Input Standards

Required if applicable/Optional
1st Indicator  Existence in LC collection
blank character No information provided
0 Item is in LC
1 Item is not in LC
2nd Indicator  Source of call number
blank character No information provided
0 Assigned by LC
4 Assigned by agency other than LC
Subfields (R=Repeatable  NR=Nonrepeatable) Input Standards
‡a Classification number (R) Mandatory/Mandatory
‡b Item number (NR) Required if applicable/Required if applicable
‡3 Materials specified (NR) Optional/Optional

Definition

The LC call number and/or class number.

Use field 050 with 1st indicator value blank and 2nd indicator value 4 (e.g., 050 14 LB890 ‡b .B52 1978) for LC call numbers assigned by agencies other than LC.

If you assign a Library of Congress classification number according to the LC class schedules, use field 050 with 1st indicator value blank or 1 and 2nd indicator value 4, or field 090, although use of field 050 is preferred. If the classification portion of your number does not conform to the LC class schedules, use field 099.

Use field 055, field 060, or field 070 for call numbers based on LC classification schedules and assigned by the Library and Archives Canada, the National Library of Medicine, or the National Agricultural Library, respectively. Use field 099 for classification numbers that are local modifications of LC class numbers.

See "Map and atlas call numbers" below for information on entering and printing map and atlas call numbers.

If you are transcribing LC copy, enter LC call numbers in field 050. However, LC does not classify some types of material. LC copy for unclassified material may have the phrase NOT IN LC. If you are transcribing such copy, do not include this phrase in field 050. You may enter a locally assigned call number in field 050 with 1st indicator value blank and 2nd indicator value 4.

Guidelines

 
Microform shelf numbers

Prior to 1981, LC used a single-record technique to indicate the microform replacement of an original item for preservation. Such records contain both the call number of the original and the microform shelf number of the replacement.

Pre-1981 replacement shelf numbers include a term that designates the type of microform (e.g., "Microfilm") and a number of one-to-five digits. The number may also include additional words, notations (e.g., "reel 1, no. 3"), and, usually, a class letter or letters from the LC classification system. Enter such shelf numbers in subfield ‡a. Enter a space between each element.

050 0 0 Microfilm 19072 E
050 0 0 Microfilm 8124 reel 1, no. 6 E
050 0 0 Microfilm Slavic 6699 TP

Enter the call number of the original in the first field 050. Use 1st indicator value blank or 1 and 2nd indicator value 0. Enter the microform shelf number in the second 050 field, 1st and 2nd indicator value 0.

050 1 0 BJ1533.C4 ‡b C49
050 0 0 Microfilm 28350 BJ

University Microfilms dissertations, 1940-1961. From 1940 to 1961, dissertations from University Microfilms in the National Union Catalog had the following style of call number:

Microfilm AC-1 no. 20,889

If you are transcribing such copy, enter the call number in subfield ‡a with spaces between each element.

050 0 0 Microfilm AC-1 no. 20,889
REC shelf numbers

In LC-created records created prior to 1992 may have a 050 with a suggested class number and 1st indicator value blank or 1 because sound recordings are not shelved by class number at LC. Records for sound recordings may carry field 050 with a shelving or other location device used by LC instead of a classification number.

Serial shelf numbers

If some issues of the serial have appeared in one or more series over a period of time, each with a different call number, the field is repeated for each call number involved.

Do not enter IN PROCESS or minimal-level cataloging numbers (e.g., MLCM 81/3002 (B), WMLC L82/1234) in subfield ‡a.

Entering call numbers in 050 and 090

Fields 050 and 090 print for institutions profiled for LC or NLM call numbers. The print program recognizes and parses LC call numbers in terms of predefined elements. The print program parses the first 7 elements. An eighth element prints on a new line. Subsequent elements are free form. The following table lists the first 10 predefined elements (a = alpha, n = numeric, x = alpha or numeric character).

The definitions of these elements remain constant, even if a call number lacks an element. For example, the first Cutter number is element 5 even if the call number has no date preceding the first Cutter number.

1 Alphabetic portion of class number (aaa) DR M JX PS HF KF Q
2 Whole number portion of class number (nnnn) 340 211 33 3523 5414 4558 11
3 Decimal number portion of class number (.nnn) .3       .13    
4 Date or other number (nnnn or nxxx)           15th  
5 Decimal point and first Cutter number (.annn) .N4 .J476 .A5 .O46 .R73 .G6 .P6
6 Date or other number following first Cutter number (nnnn or nxxx)     1968   1978    
7 Second Cutter number (annn) A313   I31 A12      
8 8th element of call number 1969 K.258         n.s.
9 9th element of call number   E8         vol. 55
10 10th element of call number. Any succeeding elements of call numbers   1970         pt. 5
Entering call numbers

Use the following guidelines to enter LC call numbers in field 050 and field 090:

  • Enter one space before a delimiter, after a subfield code, and before a date or volume number. Do not enter any other spaces, except as described in the these guidelines.
  • Enter alphabetic and numeric portions of the class number (elements 1, 2, and 3) in subfield ‡a. Do not enter intervening spaces.
050     F2161 ‡b .B63
050     DD259.4 ‡b .B527 1973
  • Enter one space before a date or other number following the class number (element 4) in subfield ‡a.
050     DK274.3 1968 ‡b .K39
050     KF4558 15th ‡b .G6 1974
050     BX830 1962.A45 ‡b P792 1972
  • If the date or other number is part of the classification number (element 4) and there is no following information, enter the date in the subfield ‡b.
050     ES275 ‡b 1962
050     ES525.5 ‡b 105th
  • If the call number has only one Cutter number, enter the decimal point and Cutter number (element 5) in subfield ‡b.
050     JX1947.7 ‡b .M5
050     DD259.4 ‡b .B527 1973
050     DK274.3 1968 ‡b .K39
050     KF4558 15th ‡b .G6 1974
050     JX1977 ‡b .A2 ST/SOA/40
050     VM341 ‡b .M9 vol. 48
  • However, if the call number begins with CS71, enter the Cutter number in subfield ‡a and the date in subfield ‡b.
050     CS71.S889 ‡b 1968
  • If the call number has two Cutter numbers, enter the first (element 5) in subfield ‡a and the second (element 7) in subfield ‡b.
050     PQ4734.V5 ‡b Z59
050     VA65.B54 ‡b B52 1972
050     Z673.L7 ‡b You
050     HF5549.5.R44 ‡b M35
050     BX830 1962.A45 ‡b P792 1972
  • If a date intervenes between two Cutter numbers, enter a decimal point before both Cutter numbers.
050     JX233.A5 1968 ‡b .B3
  • To print a decimal point before the second Cutter enter the first Cutter number, the intervening date, and the second Cutter number in subfield ‡b. The decimal point preceding the second Cutter number does not print if the second Cutter number is the first element in subfield ‡b.
050     JX233 ‡b .A5 1968 .B3
  • Enter one space after the second Cutter (element 7).
050     VA65.B54 ‡b B52 1972
050     BX830 1962.A45 ‡b P792 1972
  • Treat the term subser or Suppl. as part of the item number. Enter a space between the term and the item number. If the call number has no item number, enter subser or Suppl. in subfield ‡b. Enter subser with lowercase letters. Use an uppercase S in Suppl.
  • Enter a comma and a space after element 8 and each succeeding element to indicate a line break. The comma does not print. It indicates that a new line should begin.
  • Characters to print on one line must not exceed the margin size on OCLC printed cards, which is two characters fewer than the first indention. If the first indention is 10, the maximum number of characters per line is 8.
050     JK1369.43 ‡b .P65 1974 n.s., v.2
050     Q11 ‡b .P6 n.s. vol. 55 pt. 5
050     DT333 ‡b .S34 47. Jahrg., Heft, Nr. 8
050     AS182 ‡b .H44 1967 Abh.1, T.3
  • Multiple call numbers.

    Certain classification choices are recognized to be local decisions. For example, if one user has chosen to class together a monographic series and another library classes it separately, multiple call numbers in the master record may be appropriate. Multiple call numbers are allowed in these circumstances:

    • Classed together number vs. classed separately number for monographic series
    • Literature number vs. PZ number for fiction
    • Bibliography number vs. subject number
    • LC minimal number vs. member call number
    • Geographic classification number vs. subject classification number for maps and atlases

1st Indicator

Existence in LC collection. Whether the item is in LC's collections.

 
blank character

No information provided

 
0

Item is in LC. From LC copy only.

 
1

Item is not in LC. Also used by LC for items not shelved by classification number (i.e., sound recordings)

Note: Transcribing LC copy. If you are transcribing LC copy, assume that the item is held by LC and use indicator 0. If one of the following conditions exists, assume the item is not held by LC, follow the suggested practice, and use indicator blank or 1:

  • If the call number is enclosed in brackets, [HF314.V52U54], do not enter the brackets.
050 1   HF314.V52 ‡b U54
  • If the call number is preceded by a Maltese cross ( maltese cross ) and is enclosed in parentheses ( maltese crossDA112.G82 ) do not enter the parentheses or the Maltese cross.
050 1   DA112 ‡b .G82
  • If a class number alone is enclosed in brackets [QL336], do not enter the brackets.
050 1   QL336

2nd Indicator

Source of call number. The source of the classification/call number.

 
blank character

No information provided

 
0

Assigned by LC. From LC copy only.

 
4

Assigned by agency other than LC

Note: Transcribing LC copy. LC prints alternative class numbers in brackets below the complete call number. If you are transcribing such copy, enter each alternative class number in separate subfield ‡a's following the item number (subfield ‡b) of the complete call number. Do not enter the brackets.

Call number Enter
PZ3.S6737 Las [PR5037.N58] 050 00 PZ3.S6737 ‡b Las ‡a PR5037.N58
M2.R2384 [M5] [M11] [M140] [M178] 050 00 M2 ‡b .R2384 ‡a M5 ‡a M11 ‡a M140 ‡a M178

If you use such a call number for card production, only the complete call number (first subfield ‡a and subfield ‡b) prints.

If you prefer the alternative class number, enter the class number and an item number in field 090. Or, delete the unwanted call number from field 050 and add an item number to the alternative class number.

Subfields

 
‡a Classification number

The class number portion of the call number.

050 0 0 HE310.C45 ‡b R68 2010
100 1   Rothstein, Jason, ‡e author.
245 1 0 Carless in Chicago / ‡c Jason Rothstein.
264   1 Chicago : ‡b Lake Claremont Press, ‡c [2010]
650   0 Urban transportation ‡z Illinois ‡z Chicago ‡v Guidebooks.
[HE corresponds to Transportation and communications; 310 corresponds to Urban transportation, By region or country, United States, By city or metropolitan area, A-Z; C45 corresponds to Chicago; R68 is a Cutter representing Rothstein, Jason; and 2010 corresponds to the date of publication]
‡b Item number

The item number portion of the call number.

050 0 0 LB1028.3 ‡b .B357 2012
100 1   Bain, Alan, ‡d 1957- ‡e author.
245 1 4 The learning edge : ‡b what technology can do to educate all children / ‡c Alan Bain, Mark E. Weston ; foreword by John Hattie.
264   1 New York : ‡b Teachers College Press, ‡c [2012]
650   0 Educational technology.
[LB corresponds to Theory and practice of education; 1028.3 corresponds to Technology/Educational technology; B357 is a Cutter representing Bain, Alan, 1957- ; and 2012 corresponds to the date of publication]
‡3 Materials specified

A subset of the described material. Determine placement according to use.

050 0 0 CLASSED SEPARATELY ‡3 v. 79-
050 0
0 JX1295 ‡b .U4 ‡3 v. 1-78
245 0
0 International law studies / ‡c Naval War College.
650   0 International law.

Indexing

For indexing and searching information, see Searching WorldCat Indexes, field 050.

This page last revised: September 2, 2015